flowmarker airflow visualizer

Why Choose the FlowMarker™?

The FlowMarker™ is a portable, lightweight fogger for airflow pattern visualization testing. Generating fog at ambient temperature, the FlowMarker™ does not serve as a heat source and does not cause air to rise, but its fog follows the natural undisturbed movements of air. Unlike traditional smoke sticks, the FlowMarker™ fog is nontoxic, germ-free, and does not promote growth of organisms.

Specifications & Details


  • More accurate airflow evaluation: Detect and “mark” air currents, without creating disturbances.
  • Fast: Visualize turbulence, directionality, and potential dead spots with the touch of a button.
  • Eliminates risk of contamination: Fog is non-toxic, bacteria-free, and breaks down completely into carbon dioxide and water.
  • User-friendly: Lightweight, small, and portable design allows operation in places that are awkward or hard to reach.
  • Proven: Successfully used in a wide range of demanding applications, including pharmaceutical development, electronics cooling, room ventilation, animal cage environments, clean rooms, and wind tunnels.
  • Tamper Proof: Only certified pure FlowMarker™ fluid can be used for refill, providing assurance of contamination-free testing.
  • From the Airflow Experts: Used in conjunction with DegreeC’s precision air velocity sensors, the UAS-series, the Flowmarker II™ is a perfect companion tool to visualize the flow profiles under study.


  • Flowmarker II™ Instrument Weight: 2.5 kg [5.5 lbs]
  • Flowmarker II™ Dimensions: 210 mm x 90 mm x 135 mm [8.3” x 3.6” x 5.3”]
  • Battery (Supplied): 12 VDC / 2Ah Pb rechargeable
  • Battery Charging Time: 14 hours
  • Fog Fluid Capacity: 16 mL [0.54 oz]
  • Fog Fluid Composition: Propylene Glycol – FDA GRAS
  • Fluid Consumption:
    • 0.7 mL/min [0.02 oz/min]
    • Operates 20 minutes continuously with full fluid reservoir
    • 420 cycles, 3 seconds each
    • Auto power-off after 4 minutes without activity
  • Warm-Up Time: 20 seconds

Package details

The Flowmarker II™ comes in its own transport case and contains:
  • Flowmarker II™ Device
  • Application Tube
  • Rechargeable Lead Acid Battery 12V DC
  • Battery Charger (International)
  • Tool for Removing the Condensate Rings
  • 5x Pieces of the Condensate Ring (large)
  • 5x Pieces of the Condensate Ring (small)
  • 1x Aerosol can of FlowMarker-Fog Fluid
  • Instruction Sheets: Repair & Tank Overfilling
  • MSDS Data Sheet

Downloads & Media

Accessories and Replacement Parts

Have questions about the FlowMarker™?

Our friendly and knowledgeable sales team is standing by to answer your questions.
How may we help?